Question

A figure is located at (2,0), (2,-2) and (6,0) on a coordinate plane. What kind of 3-D shape would be created if the figure was rotated around the X-axis? Prove an explanation and proof of your answer. Include the dimensions of the 3-D shape in your explanation.

Answer 1

it's hard to explain this because this is an internal visualization thing, but if you rotate this about the x-axis you'll get a cone (notice how the side between (2,0) and (2,0) makes a circle upon rotation, which makes the base of the cone.)